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      Question

      Vermiculite is created by the industrial heat-processing

      of:
      A Granite Correct Answer Incorrect Answer
      B Mica Correct Answer Incorrect Answer
      C Limestone Correct Answer Incorrect Answer
      D Basalt Correct Answer Incorrect Answer

      Solution

      When mica is heated to high temperatures, it "exfoliates" or pops like popcorn. The resulting material is lightweight, sterile, and highly absorbent.

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